package com.gx.callback;

/**
 * Created by gx on 2017/3/3.
 */
public class B {

    public void call(CallBack a){
        /*
         * b help a solve the priblem
         */
        System.out.println("b help a solve the problem!");
        /*
         * call back
         */
        a.slove();

    }

}
